Help a noob (think I need a battery) - Road Glide Forums
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post #1 of 18 (permalink) Old 08-17-2016, 01:23 AM Thread Starter
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Help a noob (think I need a battery)

How do I know if my battery needs to be replaced?

Last week I went one day without riding my 2010 'Glide and it didn't have enough juice to start the next morning - even though it was on a Battery Tender overnight. The same thing just happened to me today.

The voltmeter on the dash reads between 14 and 16 when I ride, and pretty much stays there. So I'm guessing the electrical system is fine, but the battery is not?
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post #2 of 18 (permalink) Old 08-17-2016, 01:37 AM
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Check your battery connections first.

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post #3 of 18 (permalink) Old 08-17-2016, 02:18 AM
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What you want to do is check your voltage at the battery before starting, it should be ~ 12V. Also watch what the voltage does when cranking.

One other things, is I don't believe you should show more than 14.5V while running. However, don't take the DASH as gospel, my '94 shows 11.2 when the battery is showing 14.4.

If this looks good, reply to this, I have a couple more things to check!

-G
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post #4 of 18 (permalink) Old 08-17-2016, 05:46 AM
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Help a noob (think I need a battery)

There will be a lot of good suggestions. If your bike is a 2010 and if the battery has never been changed, it is 5-6 years old. I would say it is time for to be replaced no matter what the issue is, just my opinion.

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post #5 of 18 (permalink) Old 08-17-2016, 07:06 AM
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Originally Posted by Headrope View Post
Last week I went one day without riding my 2010 'Glide and it didn't have enough juice to start the next morning - even though it was on a Battery Tender overnight. The same thing just happened to me today.
If the thing went dead while connected to a battery tender overnight (twice..), it's possible the issue is that the battery tender is borked. Try leaving it sit overnight without the battery tender and see what happens.

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post #6 of 18 (permalink) Old 08-17-2016, 08:47 AM
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If the thing went dead while connected to a battery tender overnight (twice..), it's possible the issue is that the battery tender is borked. Try leaving it sit overnight without the battery tender and see what happens.
The battery tender isn't really a issue.
If you ride the bike once a month and it has a good battery and the charging system is in good working order then there is no need for a battery tender.
I haven't been riding my bike much because of my current health issues and the bike has been sitting for 4 to 6 weeks at a time with the security on and I can walk out and start it with no problems.
You should check the connections first and if they are clean and tight then you probably need a new battery, check out Battery Mart for a good battery for around $100.
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post #7 of 18 (permalink) Old 08-17-2016, 11:25 AM
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When ever I buy a used vehicle I replace battery light bulbs belts hoses brake pads filters. Depending on how old starter alternator water pumps. Then I know they are good.
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post #8 of 18 (permalink) Old 08-17-2016, 12:02 PM
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The battery tender isn't really a issue.
If you ride the bike once a month and it has a good battery and the charging system is in good working order then there is no need for a battery tender.
I haven't been riding my bike much because of my current health issues and the bike has been sitting for 4 to 6 weeks at a time with the security on and I can walk out and start it with no problems.
You should check the connections first and if they are clean and tight then you probably need a new battery.
I never use battery tenders either...I live in Florida.

But I think you're missing my point. If the bike is ridden daily and all is/stays fine, voltage up etc.. Chances are the cables are at least tight enough to hold it up that far. And if the battery left on it's own will go dead after one day of sitting then it should be showing some other (low voltage/cranking slow) bad behavior.

The OP stated that the bike only sat for one day.

So the question arises is there something draining the system during that time period that isn't normally connected to the bike... Like a (apparently overused) half cooked-off battery tender that is acting like an electromagnet (any coil of wire will) and putting a drain on the battery instead of supplying it with a trickle charge.
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post #9 of 18 (permalink) Old 08-17-2016, 10:09 PM Thread Starter
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Originally Posted by Stoic Joker View Post
If the thing went dead while connected to a battery tender overnight (twice..), it's possible the issue is that the battery tender is borked. Try leaving it sit overnight without the battery tender and see what happens.
Giving that a try tonight. Thanks!
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post #10 of 18 (permalink) Old 08-17-2016, 10:17 PM Thread Starter
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Originally Posted by Stoic Joker View Post
I never use battery tenders either...I live in Florida.

But I think you're missing my point. If the bike is ridden daily and all is/stays fine, voltage up etc.. Chances are the cables are at least tight enough to hold it up that far. And if the battery left on it's own will go dead after one day of sitting then it should be showing some other (low voltage/cranking slow) bad behavior.

The OP stated that the bike only sat for one day.

So the question arises is there something draining the system during that time period that isn't normally connected to the bike... Like a (apparently overused) half cooked-off battery tender that is acting like an electromagnet (any coil of wire will) and putting a drain on the battery instead of supplying it with a trickle charge.

The only reason I hooked it up to a battery tender was to see if the battery was accepting a charge. The tender has both a charging and storage mode. Storage mode engages if the battery is charged. And it did engage, making it confusing that the bike would't start.

I agree completely that a good battery should be able to sit overnight without needing a trickle charge.
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